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'Landscape' as a subject of (terrestrial) ecology can be interpreted: first, as a piece of land composed of different ecosystems; and second, as a holistic entity of aesthetic perception derived from landscape paintings and parks of the 18th and 19th century. Such entities display a characteristic arrangement of 'landscape elements' regarded as a whole and taking them apart for specific investigation will break up and virtually destroy it (e.g. a symphony dissociated into single notes). Landscape as a holistic entity satisfies emotional human needs like identification with regions, and explains the attraction of tourists. 'Entity features' are land-use and land cover combined with openness and a certain naturalness. A key question is whether you call a piece of the earth's surface just 'land' or 'landscape'– and why. Such questions touch the interface between landscape ecology and human ecology. But human ecology must not dismiss landscape functions. The most beautiful landscape will be reduced to a mere picture if it does not also provide basic life-support. Therefore, energy and matter flows and transformations between the ecosystems of a landscape have to be determined along with its climate, geomorphology (relief), soils, hydrology, species and ecosystem diversity. These different approaches, however, may never be combined into a unified whole.

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